arch/arm/mach-sa1100/include/mach/entry-macro.S

   1 /*
   2  * arch/arm/mach-sa1100/include/mach/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for SA1100-based platforms
   5  *
   6  * This file is licensed under  the terms of the GNU General Public
   7  * License version 2. This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11                 .macro  get_irqnr_preamble, base, tmp
  12                 mov     \base, #0xfa000000              @ ICIP = 0xfa050000
  13                 add     \base, \base, #0x00050000
  14                 .endm
  15
  16                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  17                 ldr     \irqstat, [\base]               @ get irqs
  18                 ldr     \irqnr, [\base, #4]             @ ICMR = 0xfa050004
  19                 ands    \irqstat, \irqstat, \irqnr
  20                 mov     \irqnr, #0
  21                 beq     1001f
  22                 tst     \irqstat, #0xff
  23                 moveq   \irqstat, \irqstat, lsr #8
  24                 addeq   \irqnr, \irqnr, #8
  25                 tsteq   \irqstat, #0xff
  26                 moveq   \irqstat, \irqstat, lsr #8
  27                 addeq   \irqnr, \irqnr, #8
  28                 tsteq   \irqstat, #0xff
  29                 moveq   \irqstat, \irqstat, lsr #8
  30                 addeq   \irqnr, \irqnr, #8
  31                 tst     \irqstat, #0x0f
  32                 moveq   \irqstat, \irqstat, lsr #4
  33                 addeq   \irqnr, \irqnr, #4
  34                 tst     \irqstat, #0x03
  35                 moveq   \irqstat, \irqstat, lsr #2
  36                 addeq   \irqnr, \irqnr, #2
  37                 tst     \irqstat, #0x01
  38                 addeqs  \irqnr, \irqnr, #1
  39 1001:
  40                 .endm
  41